The symptoms of insomnia vary from person to person and may include any of the following:
- Difficulty falling asleep,
- Awakening during sleep and having trouble going back to sleep.
- Awakening too early in the morning.
- Feeling unrefreshed upon awakening.
- Daytime irritability, drowsiness, anxiety, and/or nonproductivity at work.
Chronic sleep deprivation results in memory and concentration problems. There may be excessive daytime sleepiness and fatigue, which in turn may lead to occupational stress and marital disharmony.
Based on the duration of symptoms, insomnia is classified as:
- Transient Insomnia: When symptoms last for less than two weeks it is transient insomnia.
- Intermittent Insomnia: Insomnia is intermittent when repetitive episodes of transient insomnia occur.
- Chronic Insomnia: When symptoms last for at least a month, it is known as chronic insomnia.